<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %> 
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>     
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>我是主页</title>
</head>
<body>
<c:if test="${not empty message }">
<script type="text/javascript">
alert('${message}');
</script>
</c:if>
<h1 align="center">Welcome</h1>
</body>
</html>